22 FERNS AND 



SAXIFRAGA, L. saxifrage, 



virginiensis, Michx. early saxifrage. 

 SCHOLLERA, Schreber. water-star grass. 



graminea, Willd. yellow-eyed. 

 SCILLA, L. squill. 



esculenta, Ker. wild hyacinth. 

 SCIRPUS, L. clubrush. 



atrovirens, Muhl. 



eriophorum, Michx. wool grass. 



lacustris, L. lake bulrush. 

 SCROPHULARIA, Town, figwort. 



marilandica, i. 

 SEDUM, L. stone-crop. 



ternatum, Michx. 

 SENECIO, L. groundsel. 



aureus, L. 



obovatus, Willd. 

 SCUTELLARIA, L. skull-cap. 



canescens, Nutt. 



lateriflora, L. mad dog skull-cap. 



cordifolia, Muhl. 

 SETARIA, Beam. 



viridis, Beauv. wild timothy. 



glauca, Beauv. bottle grass. 

 SEYMERIA, Pursh. 



macrophylla, Nutt. 

 SICYOS, L. one-seeded star cucumber. 



angulatus, L. 

 SIDA, L. 



spinosa, L. prickly sida. 

 SILENE, L. catchfly; campion. 



pennsylvanica, Michx. pink catchfly. 



anterrhina, L. sleepy catchfly. 



nivea, D. C. snow-white campion. 



stellata, Ait. star campion. 

 SILPHIUM, L. rosin-plant. 



perfoliatum, L. cup-plant. 



trifoliatum, L. whorled rosin-plant. 



terebinthinaceum, L. prairie burdock. 

 SINAPIS, Town, mustard. 



nigra, L. black mustard. 

 SISYRINCHIUM, L. blue-eyed grass. 



bermudiana, L. 



SIUM, L. water parsnip, 

 latifolium, L. 



